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MFJ-392B MFJ Headphones & GREEN DVM
MFJ-392B MFJ Headphones & GREEN DVM
ISOpwr - Auxiliary Battery Isolator #58401-1044
ISOpwr - Auxiliary Battery Isolator  #58401-1044

  • Isolates and charges a 12 Volt auxiliary battery to run mobile radio and other 12 Volt portable equipment.
  • Ideal for mobile radio command stations for ARES, RACES, FEMA, and for a VHF/UHF Contest Rovers, moderately powered ham equipment, a re-charging station for electric model airplanes, boats and cars, and for RV's and campers.
  • ISOpwr turns ON when the car is running and the alternator is maintaining the car battery over 13.5 volts.
  • ISOpwr turns OFF when the alternator is off and the car's battery has fallen below 12.7 volts.
  • All solid state. FET switch. No relays. Handles up to 40 amperes. Input fuse 40 A.
  • Works safely with all types of 12-volt lead-acid batteries, Flooded Lead Acid, Gelled & AGM.
  • May be used without a battery to automatically turn a radio on whenever the car is running. The radio will turn off with a small delay after the car is stopped.
  • Dimensions: 1.65" H x 5.25" W x 3.9" D


Operating Voltage: 20 V maximum
Quiescent Current: Less than 5 mA
Maximum Current: 40 A
Voltage Drop: 0.25 V at 1 A, diode drop
Series Resistance: 0.01 ohms maximum
Switch Time-Constant: 5 seconds
Turn ON Threshold: 13.3 (+/- 0.1)V
Turn OFF Threshold: 12.6 (+/- 0.1)V
Green LED: Indicates the ISOpwr output is ON
Dimensions: 1.65" H x 5.25" W x 3.9" D
Weight: 0.9 lbs, 0.4 kg
Enclosure: Heatsink, black anodized aluminum.
Painted aluminum cover


Isopwr wired up

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This product was added to our catalog on Tuesday 21 January, 2014.
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